These points are also on the negative side of the x axis, at -pi/4 and -pi/2. When we move along the x axis, notice what happens to the y value. On the left side of zero, tangent is negative. At x=-pi/4, tangent=-1.
The Independent Online. David Cameron may have called a referendum on the EU to blackmail Europe, according to Vladimir Putin. The Russian president also questioned Mr Cameronâs decision to call the vote, as it has caused a âgreat problemâ.
Boris Yeltsin became the President of Russia because he won the country's first open election. Following the collapse of the Soviet Union, there were new nation states that were formed and they also adopted new political and governmental structures. In 1991 Yeltsin was elected President of the newly formed Russian Federation. Comments.